Gasket cutter



F. BLASAK GASKET CUTTER Aug. 2, 1949.

Filed Nov. 14, 1945 INVENTJR. Wank B/asak AT'IORNE Y,

Patented Aug. 2, 1949 UNITED STATES PATENT OFFICE GASKET CUTTER Frank Blasak, New York, N. Y. Application November 14, 1945, Serial No. 628,621 GClaims. (o1. 1e4--33) (Granted under the act of March 3, 1883, as

' ticularly concerns a tool for cutting gaskets which are suitable for use on lubricating oil pumps.

In cutting gaskets or washers from thin sheet material a tool suitable for a stamping operation or a rotary cutting operation is desirable. For performing the cutting operation it is necessary that the gasket be ejected from the tool and to this end it is advantageous to have an ejecting mechanism that will exert equal pressure on all portions of the gasket face to revent tear or deformation of the gasket which would arise from unequal local stresses during the ejection. The ejectin mechanism should be adapted for manual operation so that ejection of the gasket can be controlled and the gasket can be observed during ejection to insure against misfunctioning of the mechanism and tearing of the gasket. To insure ease of operation of the ejecting mechanism a' high mechanical advantage should be in favor of the operator, and to insure maximum precision of operation of the ejecting mechanism there should be precise control of the degree of movement of the ejecting mechanism.

The present invention achieves these advantages in a cutting tool having a bedplate upon which the cutting edges are formed, the tool having an ejectin mechanism which reciprocates relative to the cutting bedplate. A rotary, screwmounted actuator manually actuates the ejector mechanism.

An object of this invention is a cutting tool suitable for a gasket stamping operation.

Another object is a tool of the type described having a mechanical ejector for removing the gasket from the tool after the cutting operation.

Another object is a cutting tool having an ejector mechanism that provides uniform ejecting pressure on all portions of the gasket face to prevent tearing or deformation of the gasket that might arise if unequal local stresses were present during the ejecting operation.

Another object is to provide an ejectin mechanism adapted for manual operation so that ejection of the gasket from the tool can be controlled and the gasket can be observed during ejection to insure no misiunctioning of the mechanism or tearing of the gasket.

Another object is to provide a cutting tool having a screwing motion of the actuator for. the ejector to insure higher mechanical advantage in favor of the operator with consequent ease of operation and also to insure control over the degree amended April 30, 1928; 370 O. G. 757) of movement of the ejector with consequent maximum precision of operation.

Further objects and advantages of this invention, as well as its construction, arrangement and operation, will be apparent from the following description and claims in connection with the accompanying drawings, in which,

Fig. 1 is a side elevation, partly in longitudinal section, of a preferred form of the invention, with the ejector in non-operatin position.

Fig. 2 is a view similar to Fig. 1 with the ejector in operating position.

Fig. 3 is an end elevationalview as seen when viewing Fig. 1 from the left thereof.

Fig. 4 is a plan view showing a gasket of the type out by the tool of Figs. 1 and 2.

A preferred form of cutting tool forming the present invention comprises a stamping tool having a cutter ll provided with a disc-shaped bedplate l2 formed integrally with a cylindrical supporting shaft |3.. Formed on the face of bedplate 42 are a pair of concentric circular cutting edges l4 forming a channel I5 therebetween and a pair of spaced centrally disposed cutting edges l6 forming a channel I1 therebetween. Cutting edges l4 and I6 are designed during the cutting operation to define a gasket Ila having a shape such as shown in Fig. 4. Gasket Ila is shown in phantom lines in Fig. 1. Although the illustrated form of cutting tool is designed to cut a gasket by stamping, the tool can be used to perform a rotary cutting operation in making gaskets of circular or other suitable shape in which case the centrally disposed cutting edges I6 are eliminated.

An ejecting mechanism [8 removes the gasket from channels l5 and l I after the cutting operation. Ejector [8 comprises a carriage l8a. having hub l9 mounted for axial reciprocation upon shaft 13, a radially extending flange portion 20 integral therewith, and an integrally cylindrical portion 2| extending toward bedplate l2 and adapted for sliding engagement with external periphery of bedplate [2. A compression spring 22 is disposed between bedplate l2 and ejector flange 20 for constantly urging ejector 18 away from bedplate l2.

Mounted in ejector flange 20 and extending through openings 23 in bedplate 42 are rods 24, provided with a threaded extremity 25 and an enlarged portion 26 adjacent thereto that abuts against one face of flange 2B. A locknut 26a is screwed on each rod 24 against the'other face of flange 2% to lock rod 24 rigidly to flange 20. The

opposite extremity of each rod 24 extends through appended claims.

shown in Fig. 2 to cause ejecting plate 21 to move v to the left and eject gasket Ha. from channels Mounted upon shaft I3 is a collar 29 having an externally threaded portion-30' and secured in- The end of. .collar 23 adjacent ejector hub I9 serves as a stop for' place by set screw 3|.

ejector I8 to limit the movement=thereof toward the right as seen in Fig. 1.

Mounted for rotation on collar 23 is an actuator- 33-having aradially extending flange portion 34 provided with internal threads 35 adapted for engagement withexternal threads 30 on collar 2-9. Integral withzflange portion 34'is an axially extending cylindrical portion36 having a contact 1 rim 36a '.WhlCh extends into abutting engagement with ejector-flange 20. A handle'3'! is screwed into actuator 33 as indicated-at 38. Handle 31 can-be grasped by an operator to effect the rotationof actuator. 33 upon collar 29 and such'rotation through thejmedium of threads 30 and 35 causes actuator 33*to-move axially to the leftsas' seen in Fig. 1,.with the result that ejector I8 is forced to the left into the position shown in Fig. 2' whereby ejecting plate Zlrclears channels I5 and H of any gasket therein. Ejector 33 can be designed so that one complete rotation thereof causes movement from the position shown in Fig. 1"to the position shown in Fig. 2;

Mounted upon the end of shaft l3, remote from bedplate I2, is a shank :39 secured in place by means of a'setscrew 40. The extremitytof shank 3-9 adjacent actuator :33 is :enlarged to form a stop portion 4! for limiting movement of actuator 33 to the right-as seen in Fig. -1.. Shank 39 can be designed to adapt the cutting tool for use as a hand tool,;or if. desired, for use by insertion in'a'power unit such as a compressed air operated rotary tool holder.

Operation of the device is as follows. The tool is conditioned for a cutting operation by manually rotatingactuator 33 on threads-30 and 35 into abutment with stopll Inthis osition,-actuator 33 and ejector 18 are disposed in their extreme right-hand. positions as seen in Fig.v 1 and ejector plate 21 isdisposed inthe'bottom-of channels-I5 and ll. The tool can then be used to performa stamping or rotary cutting operation upon a thin ,sheet'of material (notshown) and upon being withdrawn from the sheet of. material the. freshly cut. gasket Ha -is disposed within channels I5 and I1.

Ejectionof the gasket Ila .fromchannels l5 and i1 is then effected byxmanually rotating Y actuator 33. upon-threads 30 and 35 to-cause .movement thereof to the left into the position The invention described herein may be manufactured and used by or for the Government of the United States of America for governmental purposes without the payment of any royalties thereon or therefor.

What is claimed is:

1. A tool forcutting gaskets from thin sheet .material comprising a cutter having aibedplate,

cutting edges formed on one face of said bedplate and defining a channel between said edges, a shaft integral with said bedplate and extending therefrom in the side opposite said edges;

an ejector having a carriage mounted for longitudinal reciprocation on said shaft including a series of rods mounted rigidly on said carriage and extending through said bedplate into said channel, and an ejector plate in said channel mounted on said rods; resilient means urging said carriage away from said bedplate; and an actuator mounted for screwing action relative to said shaft'to efiect longitudinal movement thereof, said actuator having a'portion adapted to contact said ejector whereby screwing action of said actuator can effect longitudinal movement of said ejector including said ejector plate.

2. A tool for cutting gaskets from thin sheet -material comprising a cutter having a circular bedplate, cutting edges formed on one face of I opposite said cutting edges; an ejector having nel threadedly-mounted on the ends of said rods; a compression spring between said bedplate and said carriage for urging said carriage away from said bedplate so that said ejector plate is urged toward the bottom of said channel; a collar having external threads rigidly mounted on said shaft adjacent said hub in the side away from said spring, said collar serving as a stop to limit -movement of said carriage under the influence of said spring; an actuator for said ejector comprising a radially extending flange portion having internal threads and mounted upon said collar in spaced relation from said ejector flange, an integral axially extending cylindrical portion having a rim adapted to contact said ejector flange, and a handle integral with said actuator whereby said actuator can be rotated to cause axial movement thereof to effect axial movement of said ejector including said ejector plate.

- 3. A tool comprising a cutter having cutting edges defining a space therebetween, an ejector in the space between the cutting edges, said ejector being mounted for free slidin longitudinal movement relative to said cutter, and an actuator adjustable longitudinally along said cutter into contact with said ejector so that said ejector can be moved in one direction by adjusting said actuator in contact with said ejector in such direction or by freely sliding said ejector :edges defining a, space therebetween, an ejector in the space between the cutting edges, said ejector being mounted for longitudinal sliding movement relative to said cutter, an actuator adjustable longitudinally along said cutter and adapted to contact said ejector and limit movement of said ejector in one direction, and resilient means for urging said ejector into contact with said actuator and for yielding by permitting movement of said ejector in the opposite direction under the influence of said actuator or independently of said actuator.

5. A tool comprising a cutter having a cutting edge, an ejector mounted on the cutter adjacent said cutting edge, said ejector being mounted for free sliding movement relative to said cutter toward and away from said edge, and an actuator adjustable along said cutter into contact with said ejector so that said ejector can be moved in one direction by adjusting saidactuator in contact with said ejector in such'direction or by freely sliding said ejector in such direction independently of said actuator.

6. A tool comprising a cutter having a cutting edge, an ejector mounted on the cutter adjacent FRANK BLASAK.

REFERENCES CITED The Iollowine referemces are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 468,613 Frist Feb. 9, 1892 557,554 Clemens Apr. '7, 1896 760,827 Vicars et a1 May 24, 1904 1,430,373 Hennings Sept. 26, 1922 2,417,813 Curtis Mar. 25, 1947 2,429,245 Telles Oct. 21. 1947 

